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Question of The Day31-01-2020

Which one of the following is not an example of convection heating?

Answer

Correct Answer : c ) Lighting of bulb

Explanation :

Convection is termed as the vertical transfer of heat in fluids and in gases. Upward movement of heat is the result of warmer air which is lighter and hence rises up vertically into the surroundings.

Steaming cup of hot tea: heat gets transferred in the surroundings in the form of steam.

Melting of ice: ice changes its form from solid to liquid by transferring heat to the ice from the surroundings.

Lighting of bulb: It is an example of radiation as when current passes through the filament of the bulb, it gets hot and emit electromagnetic radiations.

Hot air balloon: Due to convection, hot air inside the balloon rises up which in turns rises the balloon.

Hence, C is the correct answer.

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